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针对D-InSAR技术二轨法中先差分再解缠和先解缠再差分2种情况,以钱营孜矿区为例,采用ALOSPALSAR数据进行差分处理,并与地面水准观测结果进行比较,最终得出结论:两者所得沉降结果与水准观测结果沉降趋势相同,但先差分再解缠的精度要远高于先解缠再差分的精度。
According to the two methods of differential rewinding and first unwrapping and then differential in D-InSAR two-track method, taking the Qianyingzi mining area as an example, differential processing is carried out by ALOSPALSAR data and compared with the ground level observation results, finally The conclusion is that the sedimentation results obtained by the two methods are the same as the sedimentation tendency of the horizontal observation results, but the accuracy of the differential re-unwrapping is much higher than that of the first unwrapping and then the difference.